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Multi-parameter numerical simulation of dynamic monitoring of rock deformation in deep mining

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International Journal of Mining Science and Technology 2016年第5期26卷 851-855页

作者： Li Juanjuan Hu Mingshun Ding Enjie Kong Wei Pan Dongming chen shenen IoT Perception Mine Research Center China University of Mining ＆ Technology Xuzhou 221008 China The National and Local Joint Engineering Laboratory of lnternet Application Technology on Mine China University of Mining ＆ Technology Xuzhou 221008 China School of Resources and Geosciences China University of Mining ＆ Technology Xuzhou 221116 China City Exploring and Surveying Institute ofJinan Jinan 250013 China Department of Civil Engineering University of North Carolina at Charlotte Charlotte 28223 USA

The level of deformation development of surrounding rocks is a vital predictor to evaluate impending coal mine disasters and it is important to establish accurate measurements of the deformed status to ensure coal mine safety. Traditional deformation monitoring methods are mostly based on single parameter, in this paper, multiple approaches are integrated: firstly, both electric and elastic models are established,from which electric field distribution and seismic wave recording are calculated and finally, the resistivity profiles and source position information are determined using inversion methods, from which then the deformation and failure of mine floor are evaluated. According to the inversion results of both electric and seismic field signals, multiple-parameter dynamic monitoring of surrounding rock deformation in deep mine can be performed. The methodology is validated using numerical simulation results which shows that the multi-parameter dynamic monitoring methods have better results for surrounding rock deformation in deep mine monitoring than single parameter methods.

关键词： Dynamic monitoring Electric numerical simulation Elastic numerical simulation Inversion methods

Integrated Learning and Research:The Accelerated Construction Self-Sensing Project

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结构工程师 2011年第B01期27卷 320-326页

作者： chen Don chen shenen Department of Engineering Technology University of North Carolina at Charlotte 9201 University City Blvd. CharlotteNC 28223-0001 Department of Civil and Environmental Engineering Technology University of North Carolina at Charlotte 9201 University City Blvd. Charlotte NC 28223-0001

To minimize travel delay impact,the US Department of Transportation(USDOT) has been pushing for Accelerated Construction(AC) techniques for public transportation *** to traditional construction techniques,AC technology involves extensive applications of pre-fabricated *** change in construction philosophy offers a great opportunity to introduce the concept of integrating full monitoring of structural construction/aging processes with AC technology via embedded *** resulting structure can be quickly built and is able to self-sense health conditions throughout its service *** order to introduce the concept and encourage synergistic learning,a joint course between Construction Management course in Engineering Technology(ET) department and Nondestructive Testing course in Civil Engineering(CE) department, has been developed with the course content designed to engage students to research on the Smart Monitoring of Accelerated Construction(SMAC ) in a two-stage(ET-CE-ET) *** innovative approach generates synergies amongst students and encourages them to self-learn new techniques.

关键词： SMAC 建筑物 ET-CE-ET 建筑工程学

Inspection and Monitoring Techniques for Power Lines

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结构工程师 2011年第B1期27卷 334-341页

作者： DAI Kaoshan chen shenen Department of Civil ＆ Environmental Engineering University of North Carolina at Charlotte Charlotte North Carolina 28223 U. S. A.

Structural assessment is prerequisite for proper maintenance of civil *** the begining of this paper,modern inspection and monitoring methods are briefly *** in applying image-based methods for highway bridge inspection are described shortly *** are then extended to explore technologies for power delivery infrastructure *** power line components are first introduced. Structural analyses show complicated coupling phenomena in the power line system;and its vulnerability is intensified by extreme environment or human induced *** a main interest,the state-of-art of power line inspection is *** visual observations and inspections assisted with novel techniques are *** time monitoring of the power line is also investigated in this *** that have potentials for monitoring power cables,insulators,and support structures are identified.A conceptual integrated design is proposed by the authors through combining innovative inspection with promising monitoring methods to ensure a sustainable,smart power line.

关键词：控制技术绝缘体测试监测

Effective LiDAR Damage Detection:Comparing Two Detection Algorithms

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结构工程师 2011年第B01期27卷 327-333页

作者： BIAN Haitao BAI Libin WANG Xiaoyu LIU Wanqiu chen shenen WANG Shengguo Department of Civil and Environmental Engineering University of North Carolina at Charlotte Charlotte North Carolina28223 U.S.A. Department of Software and Information Systems UNC Charlotte Department of Transportation Dalian University of Technology Department of Engineering Technology UNC Charlotte

The health conditions of highway bridges is critical for sustained transportation *** federal government mandates that all bridges built with public funds are to be inspected visually every two years. There is a growing consensus that additional rapid and non-intrusive methods for bridge damage evaluation are *** paper explores the potential of applying ground-based laser scanners for bridge damage evaluation. LiDAR has the potential of providing high-density,full-field surface static ***,it can generate volumetric quantification of concrete corrosion or steel *** recording object surface topology,LiDAR can detect different damages on the bridge structure and differentiate damage types according to the surface flatness and *** determine the effectiveness of LiDAR damage detection,two damage detection algorithms are presented and compared using scans on actual bridge *** results demonstrate and validate LiDAR damage quantification,which can be a powerful tool for bridge condition evaluation.

关键词： LiDAR 激光雷达 USDOT 自动程序控制